Question Is passing game id required for mediation to work?

I'm using a custom-made version of the example code for mediation

Code (CSharp):

1.  async void InitStartAds()
2.     {
3.         try
4.         {
5.             Debug.Log("Initializing...");
6.               Status = "Initializing...";
7.             await UnityServices.InitializeAsync(GetGameId());
8.             Debug.Log("Initialized!");
9.         Status = "Initialized!";
10.    
11.             InitializationComplete();
12.         Ads_St = true;
13.         }
14.         catch (Exception e)
15.         {
16.             InitializationFailed(e);
17.            
18.         }
19.  
20.  
21.     }
22.  
23.     InitializationOptions GetGameId()
24.     {
25.         var initializationOptions = new InitializationOptions();
26.  
27. #if UNITY_IOS
28.             if (!string.IsNullOrEmpty(iosGameId))
29.             {
30.                 initializationOptions.SetGameId(iosGameId);
31.             }
32. #elif UNITY_ANDROID
33.         if (!string.IsNullOrEmpty(androidGameId))
34.         {
35.             initializationOptions.SetGameId(androidGameId);
36.         }
37. #endif
38.         return initializationOptions;
39.     }

I'm not passing anything for "androidGameId" but everything works like intended, which puzzles me if the passing game id is actually required.

 

I found my answer https://docs.unity.com/mediation/AdsWithMediationMigrationGuide.html

Code (CSharp):

1.   public string GAME_ID = "000000"; //optional, we will autofetch the gameID if the project is linked in the dashboard